The stock Onkyo ND S1 has superior sound to the Wadia iDock and can be had at half the price on ebay from Japan with a universal power supply that works perfect in the USA. Or you can do as I did and purchase a laboratory grade Lambda regulated linear power supply which yields better sound yet. Also, I had Steve Sank of Talking Dog Transducer Company in Tucson (30 years experience) upgrade my Onkyo ND S1 for even better sound.
